I've only had two scans. I had one at twelve weeks, but it was only a little one with my OB. I had the next one at 21 weeks. Part of me would like to see my baby again, but I'm going to see him/her in a few weeks anyway so I won't bother. Unless I feel that there's something wrong, I think the better part of me would just like the surprise and the anticipation of seeing him/her at birth.